Kelly Clarkson stunned the crowd with her "Shallow" rendition at her concert in Green Bay, Wisconsin.
(Getty)

Kelly Clarkson’s rendition of the popular and Grammy Award-winning song “Shallow” stunned the audience at the singer’s Friday night concert in Green Bay, Wisconsin.

Before Clarkson, 36, performed her version of the song -- which singer Lady Gaga and actor Bradley Cooper perform together in their recent movie “A Star Is Born” -- she took a moment to gush about Gaga.

In late January, Cooper – who, aside from costarring in the movie, also served as its director – and Gaga, 32, went viral after he took the stage at the singer’s show in Las Vegas, taking many fans by surprise.

Later, the 44-year-old actor said he’s sure he’ll be “terrified” when he and Gaga perform “Shallow” live at the 91st Academy Awards on Feb. 24.

Madeline Farber is a Reporter for Fox News. You can follow her on Twitter @MaddieFarberUDK.